Method of and apparatus for preventing the burning of gas-pressurereducing valves



June5,1923. Q N mamas" E. WISS METHOD OF AND APPARATUS FOR PREVENTING THE BURNING 0F ens PRESSURE REDUCING VALVES Filed July 18. 1921 Figidr w ,1}

Patente June 5, 1923.

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ERNST WISS, F GRIESHEIM-ON-THE-MAIN, GERMANY, ASSIGNOR TO THE FIRM OHEMISCHE FABRIK GRIESHEIM-ELEKTBON, 0F FRANKIEORT-ON-THE-MAIN, GERMANY, A CORPORATION OF GERMANY.

METHOD OF AND APPARATUS FOR PREVENTING THE BURNING OF GAS-PRESSURE- REDUCING VALVES.

Application filed July 18, 1921. Serial No. 485,763.

T 0 all whom it may concern Be it known that I, ERNST Wrss, a German subjeot, residing at Griesheim-on-the- Main, Germany, have invented certain new and useful Improvements in the Methods of and Apparatus for Preventing the Burning of Gas-Pressure Reducing Valves, of which the following is a specification.

It is known that valves for reducing the pressure of oxygen are liable to burn, if the high-pressure cylinder containing the gas be opened too suddenly, through the generation of heat due to compression in front of the hard-rubber valve plug. Any device intended to prevent the valve from such dangerous burning must prevent compression in the pressure-reducing valve and consequently the generation of heat and moreover, for reasons of a generally economic na- 2 ture it must not cause any considerable addi tional loss of pressure in the gas current.

None of the existing protective devices against burning of the valves fulfils both requirements. In the known devices in which auxiliary chambers are employed, the chambers cannot do away with the generation of considerable heat due to compression and, consequently, the ignition of any mixtures of oxy-hydrogen gas present is still possible.

On the other hand, the insertion into large valves of substances having high heat conductivity and capacity, greatly diminishes the gas orifice.

By the present invention the defects above referred to are overcome, to a large extent, by directing the high-pressure gas vortically against the hard rubber plug and then diverting it back into the central or peripheral depression of the vortex, whereby it is cooled 4.0 by contact with the oncoming cold gas.

Reference being had to the drawings herewith :Fig. 1, illustrates alternative forms of vortex producing nozzles respectively in transverse section and front view.

M Fig. 2, illustrates the method of applying the nozzles above referred to.

To produce the vortex in the gas, a perforated nozzle (see Fig. 1) may, for example, be advantageously used. By arranging the openings-which may be of any number-so that they all discharge at the same angle in a suitable manner; the individual jets of gas issuing from the nozzle so that they all flow in the same direction over a conical surface and so that they can be combined in the space between the nozzle and the plug (Fig. 2) in such manner as to form a spiral vortex. By the analogy of meteorological phenomena there is formed in the interior of such a vortex an area of low pressure, and therefore the gas, arriving in front of the hard rubber plug, of the pressurereducing valve is drawn back axially towards the nozzle arranged in the high-pressure passage of the reducing valve, partly as the result of its own surplus pressure, partly through the depression existing in the centre of the vortex, and partly on account of the conical surface above referred to, and is thereby cooled by the cold gas emanating from the openings and by its impact against the cold walls of the nozzle itself. Reflux currents, having a similar effect on the gas arriving in front of the plug, are set up when the nozzle (Fig. 2) is of the form marked 7) instead of in the form marked a.

It has been ascertained that both arrangements afford suflicient protection against the accumulation of injurious heat due to compression and against the burning of the valve, even if the contents of the cylinder consisted of oxy-hydrogen gas. At the same time the present arrangement offers the advantage that in consequence of the powerful whirling action, the aperture of the valveplug may be larger than the effluent orifice of the passage for the high-pressure gas. lhis circumstance, in conjunction with the advantageous tangential outflow of the gas in front of the opened hard rubber plug while the apparatus is in use so far prevents loss of pressure in the gas current that no obstructive action is set up therein. As has also been ascertained by experiment the present arrangement obviates, to a large extent, the drawbacks mentioned above in connection with other devices of the kind.

The production of the vortical current can, of course, be effected by some other suitable means. In any event the only essential feature is the attainment of such a distribution of pressure that decided depressions are set up in addition to areas of high pressure.

I claim- 1, The method of preventing the burning of gas pressure 'reducing'valves by producing inthe gas Which is under pressure a vortical motion prior to impingement thereof on the valve.

2. ,The method of preventing the burning of gas pressure reducing valves by producing in the gas which is under pressure a vorti'cal'inotlon and directingthe 'gas'against the valve plu 3 The method of preventing the burning pensing gas under pressure, a discharge conduit, a valve 'eontr'ollingtheflow of gas in said conduit,'-and means in said conduit on the high pressure side of said valve for creating a vertical motion of the gas;

5 In 'an apparatus for storing and dispensing gas under pressure, a discharge conduit, a valve plug in the effluent orifice of "said conduityand a nozzle insai'd conduit having obliquely disposed passages for producin avortical motion of the as ri'or to b i t:

' impingement thereof on said valve plug.

6. In an apparatus for storing and dis- -'o'utivardly with respect to the nozzle.

ast/see pensing gas under pressure, a discharge conduit, a valve-1n said condult, and a nozzle on thehigh pressure side of said valve, said nozzle having a plurality otpassages therethrough. arranged obliquely to the axis.

thereof, for the purpose described.

7. In an apparatus :tor storing and dispensing gas under pressure, a discharge conduit a hard rubber plug valve in the efiiuent orifice of said conduit, and a nozzle on the high pressure side of said valve having a plurality of obliquely arranged passages therethrough for producing a vortical mot on of the gas;

"8. In an apparatus for storing and -di pensing'gas under pressu're,.a discharge conduit, a valve'in s'aideonduit, and a nozzle on the high pressure side of said ,val-ve,'said nozzle having a plurality of passages therethrough arranged obliquely and directed axis of said In "testimony whereof I have signed my name to this specification'in the presence of two subscribing Witnesses. q

I ERNST. VVISS.

Witnesses: a

EDUARD' WEBER ANDREAE, THOMAS Gnons NARIP. 

